Pi NoIR

The Pi NoIR infrared camera module is a custom designed add-on for the
Raspberry Pi
to take infrared images and videos.
It attaches to the Raspberry Pi by way of one of the small sockets on the
board upper surface. This interface uses the dedicated CSi interface, designed
especially for interfacing to cameras.

The board itself is tiny, at around 25 mm x 20 mm x 9 mm.
The sensor itself has a native resolution of 5 megapixel. In terms
of still images, the camera is capable of 2592 x 1944 pixel static images,
and also supports 1080p30, 720p60 and 640x480p60/90 video.

Note:
The Pi NoIR camera is sensitive to short-wavelength IR radiation (around 880 nm)
produced by infrared emitting LEDs. It is not sensitive to long-wavelength IR radiation
(heat), so it requires an LED 'illuminator' to see in the dark.